Verilink SCC Craft Port -- SLOT --
The line below "SLOT" lists the numbers 1 through 13. each of these represents
a possible slot in a possible shelf. Where a card is seen to be present, a letter
will be shown. The legend below this display indicates which type of card each
letter represents. For example, a C represents a CSU card, a D represents a DIU2130 card, etcetera...